Abstract: A tube separator comprises an inlet and an outlet to define a flow direction from the inlet to the outlet, shut-off means arranged between the inlet and the outlet for connecting the inlet with the outlet in a first position thereof and for disconnecting the inlet from the outlet in a second position thereof, control means for operating the shut-off means and a non-return valve at the outlet for blocking or allowing fluid flow from the inlet to the outlet. The shut-off means comprises a shut-off member being arranged in the shut-off means for rotation around an axis perpendicular to the flow direction from a first rotational position to a second rotational position thereof, and a bore is provided in the shut-off member for connecting the inlet with the outlet in the first rotational position and for disconnecting the inlet from the outlet in the second rotational position.